My numbers are close to right on, but it does change depending on the type of bulb and cooling of the bulbs. Just check reef central there are numerous threads on par decrease over time. I guarantee you my numbers are on par with what everyone has been testing and coming up with.

I didn’t make any mention of how par effects algae growth. My comment was directed to the people who said there was no need to change their bulbs unless they burn out. I already address effects color spectrum has on algae growth in my previous posts.